<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        span{
            color:red;
        }
        #myspan{
            color:blue;
        }
    </style>
</head>
<body>
    <span id="myspan">1.html</span>
</body>
</html>